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amecI9 <br />D) Overburden Fill Placement <br />Overburden fill material was delivered from CC &V Mine Operations throughout both day and night <br />shifts. Ames CAT D -10 dozers were used to maintain the borrow area. A CAT 993 front -end <br />loader, a CAT 992 front -end loader, and a CAT 385 excavator were used to load overburden fill <br />material into CAT 40 -ton articulating, CAT 773, and CAT 777 haul trucks. <br />Overburden fill was placed in the areas shown on Figure 1. Overburden fill was placed in 36" to <br />40" loose lifts using various CAT dozers, keying into existing slopes when necessary. Various <br />CAT excavators with a hammer attachments "broke up" oversize boulders before they were <br />placed in the fill. Each lift was moisture conditioned using a CAT 773 water truck (when <br />necessary) and compacted using a 10 -ton vibratory smooth drum compactor, passing over the <br />entire fill surface at least 4 times (method compaction technique was applicable). <br />Subgrade temperatures were monitored by an AMEC field representative prior to fill placement. <br />Fill material was not placed until the entire fill area was at or above 32 °F. Fill temperatures were <br />then monitored every hour during ambient temperatures below 32 °F. No frozen material was <br />placed during the week. <br />E) Slope Contouring <br />Slope contouring was performed using a John Deere 850 excavator. Material generated during <br />slope contouring was placed as overburden fill at the top of the slope. <br />F) Soil Liner Fill (SLF) <br />No work performed during the week. <br />G) Drain Cover Fill (DCF) <br />No work performed during the week. <br />Location <br />This Wseek <br />Cumulative <br />Comments <br />DCF Process <br />- <br />158,613 <br />DCF processing is temporarily paused <br />Total <br />- <br />158,613 <br />DCF processing is temporarily paused <br />H) Miscellaneous <br />No work performed during the week. <br />II) Underground Mine Workings <br />A) Discovery <br />No new Underground Workings were encountered during the week. <br />B) Drilling <br />Confirmatory drilling was performed at Underground Working #4081 using one track mounted drill <br />rig. A drill pattern was set out by an AMEC field representative. Seventy -three holes were drilled <br />encountering twenty -one voids. An approximate total of 3,650 linear feet was drilled. As -built <br />survey of the drill holes was performed by Ames. <br />Grouting of missed (non -void) confirmatory drill holes was performed at Underground Workings <br />#4073 and #4081. A grout pump and laborers were used to place bentonite grout into the "miss" <br />drill holes. <br />MEW Weekly Report WE 05.12.2012 <br />